File:Foster022.jpg
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Fig. 22. VIEW OF THE PELLUCID AREA OF A BLASTODERM OF 18 HOURS.
None of the opaque area is shewn, the pear-shaped outline indicating the limits of the pellucid area. At the hinder part of the area isseen the primitive groove pr., with its nearly parallel walls, fading away behind, but curving round and meeting in front so as to form a distinct anterior termination to the groove, about half way up the pellucid area.
Above the primitive groove is seen the medullary groove m.c., with the medullary folds A. These diverging behind, slope away on either side of the primitive groove, while in front they curve round and meet each other close upon a curved line which represents the head-fold. The second curved line in front of and concentric with the first is the commencing fold of the amnion.
{Template:Foster 1883 Figures}}
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 07:13, 9 January 2011 | | 791 × 793 (112 KB) | S8600021 (talk | contribs) | Fig. 22. VIEW OF THE PELLUCID AREA OF A BLASTODERM OF 18 HOURS. None of the opaque area is shewn, the pear-shaped outline indicating the limits of the pellucid area. At the hinder part of the area isseen the primitive groove pr., with its nearly parallel |
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